Person: ÖZALP, RABİA GÖZDE
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ÖZALP
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RABİA GÖZDE
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Publication Expression profile of prostaglandin enzymes in cystic endometrial hyperplasia in dogs: The results of a hypothesis in clinical trial(Kafkas Üniversitesi, 2023-01-30) Korlu, Yeşim; Yavaş, Özkan; Aktar, Ahmet; Bozkurt, Berkay; Özyiğit, Musa Özgür; Özalp, Gözde Rabia; Korlu, Yeşim; YAVAŞ, ÖZKAN; Aktar, Ahmet; ÖZYİĞİT, MUSA ÖZGÜR; ÖZALP, RABİA GÖZDE; Veteriner Fakültesi; Jinekoloji ve Doğum Ana Bilim Dalı; 0000-0002-2975-2594; AAE-3607-2019; KHD-4075-2024; CZR-5232-2022; CBC-1744-2022; HPY-3936-2023The expressions of prostaglandin synthesis enzymes and estrogen, progesterone receptors in canine cystic endometrial hyperplasia (CEH) were reported in this manuscript. Uterine tissue samples were collected from bitches with CEH (n=5), CEH-P (Cystic endometrial hyperplasia-Pyometra) (n=5) and healthy-negative control group, CG (n=5). Immunohistochemistry was carried out for the estrogen (ER) and progesterone receptor (PR) detection. Shock-frozen samples were utilized in mRNA extraction and Real-Time PCR was performed. Gene expression of PTGS2/COX2, PTGES, PTGER4, PGFS, PTGFR and PGR were detected higher in the CEH group compared with CG. The PGFS and PTGFR (FP) mRNA expressions were significantly increased in CEH compared with other groups. Expression of progesterone receptor mRNA (PGR) was highest in CEH and statistically different from the CEH-P group (P<0.05). No PR immunostaining was observed. ER staining had been detected in endometrial glands, endometrial stoma and myometrium, however hyperplasic glands in propria mucosa had lower or no ER scores. Based on the results of this study, the high levels of prostaglandin enzymes and low ER scores in CEH could be a preliminary step for the next stages of severe differentiation of endometrium.Publication Genotoxic and cytotoxic effects of the aglepristone, a progesteron antagonist, in mid-gestation pregnancy termination in rabbits(Kafkas Univ, Veteriner Fakultesi Dergisi, 2015-03-01) Vatan, Özgür; Bağdaş, Deniz; Çinkılıç, Nilüfer; Wehrend, Axel; Özalp, Gözde Rabia; VATAN, ÖZGÜR; Bagdas, Deniz; ÇİNKILIÇ, NİLÜFER; ÖZALP, RABİA GÖZDE; Fen Edebiyat Fakültesi; Biyoloji Bölümü; 0000-0002-7687-3284; 0000-0002-3595-6286; 0000-0003-4694-6937; ISV-0209-2023; O-7508-2015; AAH-5296-2021; AAE-3607-2019; EOB-5882-2022Aglepristone is an antiprogestin using for pregnancy termination in veterinary medicine. The information about side effects of aglepristone is limited. The aim of the study was to investigate cytotoxicity and genotoxicity of aglepristone in mid-gestation pregnancy termination in rabbits. Fifteen New Zealand White rabbits were used and pregnant does were randomly divided into three groups. Group I (n=5) was treated with saline as the control. The does in group II (n=5) and group III (n=5) were treated with aglepristone (10 mg/kg) on 15th day and 15th-16th days of pregnancy, respectively. The rabbits were sacrificed by guillotine 24 h after last treatment. Bone marrow and blood samples were immediately collected. Cytotoxic and genotoxic potential were tested by micronucleus and Comet assays. No genotoxicity and cytotoxicity were found in micronucleus test with single aglepristone administration. In contrast, two consecutive treatments of aglepristone showed high genotoxic and cytotoxic effects on bone marrow in animals. While comet assay of blood samples did not show any significant difference between groups; the results from comet assay of bone marrow cells showed the single injection of aglepristone did not induce any DNA damage but two injections group increased the DNA damage.Publication Expression of steroidogenic enzymes in placentome of ewes with pregnancy toxemia after two parturition induction methods(Hellenic Veterinary Medical Soc, 2023-04-01) Özalp, G. R.; Ortaç, C. T.; Bozkurt, B.; Risvanli, A.; Aktar, A.; Yavuz, A.; Korlu, Y.; Şeker, I.; ÖZALP, RABİA GÖZDE; Ortaç, C. T.; Aktar, A.; Korlu, Y.; Veteriner Fakültesi; Döreme ve Suni Tohumlama Ana Bilim Dalı; HPY-3936-2023; IXQ-0534-2023; CBC-1744-2022; CZR-5232-2022The regulation pattern of important enzymes in placental steroidogenesis and prostaglandin production in ewes with pregnancy toxemia is reviewed. The alterations of gene expressions after the administration of aglepristone (AG) and dexamethasone (DEX) are also discussed. Four healthy (CG) and 22 ewes with experimental pregnancy toxemia were included in the study. Ewes with pregnancy toxemia of group AG (n=9) and group DEX (n=9) were injected twice with 10 mg/kg of aglepristone and once with 5 ml dexamethasone respectively to induce parturition on 141 & PLUSMN;1,3 day of gestation; whereas healthy control [Group CG (n=4)] and pregnancy toxemia [Group PT (n=4)] group received no treatment for parturition induction. Placentomes were immediately collected right after the expulsion of the last lamb. mRNA extraction from total placentome capsule, cotyledon and caruncle was carried out and Real-Time PCR was performed. Serum samples were collected from ewes and cortisol, PGFM, PGE2, estrone sulfate and progesterone concentrations were measured after treatments until parturition. The lowest mRNA expressions of steroidogenic enzymes were detected in group PT. Interestingly expression pattern of steroidogenic enzymes in group AG was similar to group PT. No difference was found in mRNA expressions of 3 & beta;HSD and CYP19 among groups. Between groups, AG-DEX the mRNA expressions in the caruncle of PTGS2/COX2 and PGFS were statistically different respectively (P<0.005). A significant difference could be observed in EP3 expression in the caruncle of DEX and AG compared to CG (P<0.05); however PTGES, EP1, EP2, and EP4 expressions were not statistically different among groups (P>0,05). Estrone sulfate, PGE,2 and PGFM concentrations were statistically different, however, no difference was observed in cortisol levels between groups. The present study suggests that the endocrinologic pathway controlling parturition is different in ewes with pregnancy toxemia. Dexamethasone administration endocrinologically mimicked normal partu-rition, but the genes regulating uterine contractions were similarly expressed, as in group PT. Probably expressions of EP1 and tissue-specific counter-expressions of cervical EP genes could refer to the pathogenesis of insufficient cervical dilatation, observed in pregnancy toxemia and dexamethasone applications.Publication In the porcine placenta, aromatase (CYP19) is specifically expressed in trough-like structures of the trophoblast at the basis and flanks of chorionic folds(Polish Soc Veterinary Sciences Editorial Office, 2021-08-01) Khatri, Pershotam; Schuler, Gerhard; Özocak-Batmaz, Elçin; Özalp, Gözde Rabia; Özocak-Batmaz, Elçin; ÖZALP, RABİA GÖZDE; Uludağ Üniversitesi Veteriner Fakültesi; Doğum Bölümü; 0000-0002-9412-3743; FOM-0178-2022; DKN-0912-2022Aromatase was localized in the porcine placenta by immunohistochemistry during the first peak of maternal estrogen concentrations (D25; n = 3), their nadir around midgestation (D50; n = 3) and their second increase in late gestation (D110; n = 3). On D25, aromatase was highly expressed throughout the trophoblast. On D50, its expression was restricted to the trophoblast lining the trough-like fossal regions between the bases of chorionic folds. However, immunostaining was detected only in a minor proportion of these locations, with staining intensity being generally only weak to moderate. On D110, distinct to intense immunostaining was found in virtually all trophoblast fossal regions and in similar structures at the flanks of chorionic folds adjacent to the free margins of secondary and tertiary endometrial folds. A weak staining of questionable specificity was occasionally observed in endometrial glands. In other cell types of the utero-placental compartment, aromatase was undetectable. The results suggest that in pigs placental estrogens could be involved in the formation of a more complex geometry of the feto-maternal interface as pregnancy progresses.Publication Oxidative stress in dogs during mid-gestation abortion: Fetal and maternal antioxidant alterations with clinical and hematological features(Hellenic Veterinary Medical Soc, 2022-04-01) Gül, Mehmet Zafer; Seyidoğlu, Nilay; Özalp, Gözde Rabia.; Büyükuysal, Levent; BÜYÜKUYSAL, RİFAT LEVENT; ÖZALP, RABİA GÖZDE; Veteriner Fakültesi; Farmakoloji Ana Bilim Dalı; DKN-0912-2022; JHN-8745-2023The present study aimed to evaluate the GSH and MDA levels in dog???s serum and vital organs of aborted fetuses, after application of two abortifacient. Animals of group I (n = 6) were treated twice with subcutaneous injection of 10 mg/kg aglepristone and group II (n = 3) received prostaglandin F2?? at a dose of 125 ??g/kg every 12 hours until abortion process completed. Hematologic examinations and sedimentation rates were performed of bitches. The duration between the first occurrence of vaginal discharge to first expulsion of fetuses ranged between 14-29 hours (mean: 22.6??5.5 h) and 24-33 hours in group I and II, respectively. Both treatments significantly increased the serum MDA levels (P<0.01); however aglepristone increased the MDA levels throughout the study, prostaglandin enhanced plasma MDA levels only on day 1. GSH levels were significantly lower in aglepristone-treated bitches than prostaglan-din-treated animals (P 0.05). The treatments resulted in similar MDA levels in liver and heart tissues (P 0.05). GSH levels in kidney, muscle and heart tissues did not differ between groups (P>0.05), aglepristone resulted reduced GSH levels in liver tissue (P<0.05). High MDA levels could be evaluated as a useful marker for fetal suffering in pregnancy controls. The MDA and GSH levels, measured in vital organs of fetuses, could suggest possible toxic effects of aborti-facients in newborns, as both medical agents are being used in parturition induction.